Cooler insert



FIG. 1 is a front view of a cooler insert showing my new design, a rear view being identical;

FIG. 2 is a left side view of the cooler insert, a right side view being identical;

FIG. 3 is a top view of the cooler insert, a bottom view being identical; and,

FIG. 4 is a front bottom perspective view of the cooler insert, a front top view being a mirror image thereof. 

CLAIM The ornamental design for a cooler insert, as shown and described. 